Vanishing-thread tap.



PATENTED JULY 12, 1904.

H 11. BORIE. VANISHING THREAD TAP.

( rag/Q5:

I -mw- APPLIUATION FILED mm; 10,1903.

N0 MODEL.

tool for as to produce vanishing lliviri-tn drains PatentedJuly 12,1904; I

lFlariaiur l-lllRAll l lit. BORHE, OF Pl llLt tlJlglLPhllA, PENNlEYLVANlA, .ABSIGNOR TO llA'llO hlAlL TUBE CUltlPANY, OF Pllllltllilllltl, PENNSYLVANIA, A CURPORATIUN OF Emm JERSEY.

fiPlEEtlLFIGATION forming part of Letters Patent No.

restate, dated July 12, 1904.

Application filed Julie 10, lQQB. Serial No. 160,90 on) model.)

To all whom, it Inn/ 7] concern:

Be it known that l, Hnmiu R. Benin, a resident of Philadelphia, in the county of Philadelphia and State of Pennsylvania, ha-"ve invented a new and useful Improvementin Vanishing-Thread Tape; and l do herehy declare be'a full, clear, and exact de- My invention relates to stab and finishing tapping and finishing pipe-sockets and similar ring-uhapcifl or tubular articles; and the object of my invention is to provide a tool which will not only form the screwthreads in the socket, but will also ream out the, threads toward one end of said socket, so threads therein, and may also, if desired finish the end of the socket. I v i In the manufacture or pipe-sirickets it is desirable that the threads at the end he reduced in height or cut away, so that substantially a plain inner surface will he formed which will clap over and cover the threads on the pipe section Where the latter run out. i t is also desir: hle that the ends of the socket he linished or smoothed down by retrieving hure, tins, and other irregularities. the manufacture of these sockets the thread ing and finishing or rean'iing has either been d one lay meansoi separate tools and machines, thus necessitating two haudlings of the noun ling, or else the reaming or finishing tools have been so mounted on the tap-body that they are incapable of movenient relatively to the threadinn-cutters during the operation of the tool, so that in case of an excessively long coupling, in wllichit is necessary to drive'the tap down farther, these reaming or linishiing the finishing or reaming cutters can he thrown out of operation at any sthgc of the tappi 11g and without stop nngr the tool.

To this end the tool comprises a body havl -l eretot'ore in which may be either solid with the ,hody or radially collapsible therein, so as to permit the easy removal of the tool from the finished socket, said body also having" mounted theme in to the rear of the thrcadirig-cutters oneor more unthreaded tools, such as reaming or facing cutters, which will ream out the threads at the ends of the socket to produce the vanishing threads or otherwise finish the end of the coupling as desired, these reaming and finishing cuttersheinn so mounted in the bod y that they'can he withdrawn from the socket being tapped while the threading-tools are still in operation.

In the accompanying drawings, Figure l is a View, partly in. side elevation and partly in cruitral imigitudi11al section, showing 'my improved tool. Fig. 2 is a front end view of the same.

sleeve or collar. l ig. lis e side view of a suitable tool 'i'olfoperati mg the same. Fig. 5 IS a side view oi aream1ng-cuttoriorproduc inn' vanishiiur threads; and Fig". 6 is a similar view oi a modified form of cutter which will not only produce vanishing threads, but also hovel the end of the socket. My improved tapping and finishing tool comprises a hody 1 ol suitahlesizeand shape, depending upon the Size of coupling'lto he tappeijl, and provided at one end with the shank 2, wlutrehy it may be attached to the machine- SIlllltlll't, this tool heing adapted to be either rotated or held statimiary, depending upon whether the socket ishcld stationary or rotated in the forward end of thetool are n'lounted a series oi threading or chasing cutters 3,

which project radially, as shown, and havetheir outer faces throadedin the usual way of making out of this character. 'These threadinn-cutters may either he straight or taper-ml and may either be mounted lixedlyin the body or mounted therein so as to he collapsible radially in order to permit the withdrawal of the tool from the finished socket without reversing the tool, as will be readily understood without further d iscription do liigr. 3 is a side view of the cent the drawings these cutters have been shown as mounted fixedly in the body, and they are shown as seated in radial slots cut in the body from the front end thereof and are held in position by means of a face-plate 4 and screwbolts 5. Also formed in the body and preferably alternately with the threading-cutters 3 are radial slots 7, in which are mounted the reaming or finishing cutters 8, so that they can be taken out and changed without disturbing the threading-cutters. The finishing cutters may be of various shapes, depending upon the particular work they are toperform.

in Figs. 1 and 5 they are shown provided with straight tapered cutting-faces 9, which will act to ream out the threads at the end of the socket on a taper, thus producing vanishing threads. In Fig. 6 is shown a cutter having not only the tapered straight reaming-face 9 to produce the vanishing threads, but also the inclined cutting-face 10 to finish the end of the socket on a slight bevel. forms of finishing-tools may be employed, de pending upon the particular shape or finish to be given to the end of the socket. Preferably these finishing-tools will be sl-idably mounted in the grooves 7, so that they can be withdrawn from the socket after the desired finish has been given to the end of the latter ters 8 is provided with a rearwardly-projecting shank 11, on which is a radially-projecting or projection 12. Surrounding the body 1 is a sleeve 13, which is provided on its inner face with an annular groove 1%, into which the projections 12 of the cutters lit. The sleeve 13 is providedlwith a cam-slot l5, and projecting through said slot and tapped into the body 1 is a pin 16, so that by merely rotating the sleeve on thebody this pin will ride in the cam-slot 15 and cause the sleeve to move lengthwise of the body, thus projecting or withdrawing the finishing-cutters 8, depending upon the direction of rotation g i rw oi the sleeve. lhis sleeve may be rotated by hand; but preferably 1 employ a spannerwrench,-such as shown in Fig. l, having the handle 18 and'cnrved portion 19 to embrace the sleeve and having on its end a tooth or projection 20, which will catch into the cam-slot 15 or other suitable opening in the'sleeve.

in use the tool described may be either so tated and the socket to be finished held sta-' in the socket in the usual we the tool being fed forward either by the action of the Various other threading-cutters themselves or by other suitable mechanism, as is well understood. The

sleeve 13 will have been turned so as to project the finishing-cutters 8 forwardly, and when the tool has entered a certain distance into the socket these finishing-cutters'will come into action and will ream out the threads at the end of the socket, so-as to produce ta-- be done without arresting the action of the threading-cutters, and the latter will continue in operation until the thread has been finished.

The tool is simple in construction, cannot get out of order, and is efficient in operation.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A threading and finishing tool comprising a body, one or'more threading-cutters mounted therein, one or more tin-threaded finishing-cuttcrs also mounted in the bot y to the rear of the threading cutters, and means for throwing said finishingcntters out of operation while the tool is in operation.

2. A threading and finishing tool comprising a body, one or more threading-cutters mounted therein, and one or more nnthreadcd or finishing cutters mounted in the body to the rear of the threading-cutters so as to be longitudinally movable therein, and means for moving said cutterslongitudinally while the tool is in operation.

3. A threading and finishing tool comprising a body, one or more threading-cutters mounted therein, one or more unthreaded or finishing cutters mounted in radial slots in said body to the rear of the threading-cutters, and a cam-ring arranged to engage said finishing-cutters and move the same longitudinally of thebody.

4. A threading and finishing tool comprising a body provided with a series of radial slots, one or more tln'eadingcutters mounted in alternate ones of said slots, unthreaded or finishing cutters mounted in the remainder of 'said slots so as to be movable longitudinally therein, teats or projections on said finishingcutters, a sleeve provided with an annular slot for enga ing said projections and also provided with a camslot,' and apin or stud secured to the body and projecting into said cam-slot;

in testimony whereof I, the said lilIRAM. R. Bonus, have hereunto set my hand.

HIRAM R. BORlE.

ltitnesses:

Buns. H. Runsnmv, harm. it. ANNEl-l. 

